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Class Information
Number: 398/188
Name: Optical communications > Transmitter > Having particular modulation > Phase modulation
Description: Subject matter includes a form of angle modulation in which the instantaneous phase angle of a sine wave carrier varies proportionally with the instantaneous va lue of an amplitude of a modulating signal.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8712251 Transport of multiple asynchronous data streams using higher order modulation Apr. 29, 2014
8705900 Optical modulator Apr. 22, 2014
8705970 Method for data processing in an optical network, optical network component and communication system Apr. 22, 2014
8705979 LD driver with an improved falling edge of driving signal and optical transmitter providing the same Apr. 22, 2014
8705981 Driver circuit of optical modulator Apr. 22, 2014
8693867 Methods and systems for frequency stabilisation of multiple lasers Apr. 8, 2014
8693893 Picosecond optical switching using RF non-linear transmission lines Apr. 8, 2014
8693891 Optical modulation apparatus and optical modulation method Apr. 8, 2014
8693890 Look-up table and digital transmitter based architecture for fiber nonlinearity compensation Apr. 8, 2014
8687968 Vector sum phase shifter, optical transceiver, and control circuit Apr. 1, 2014
8687970 Modulator and demodulator for a differential optical modulation format with eight phase changes Apr. 1, 2014
8687973 Voltage generator, control circuit, vector sum phase shifter, and optical transceiver Apr. 1, 2014
8687979 Method, device and system for generating and receiving a phase polarization modulated signal Apr. 1, 2014
8682178 Method and system for setting timing of phase modulation of xPSK transmitter Mar. 25, 2014
8682177 Super high speed optical frequency sweeping technology Mar. 25, 2014
8670678 Digital coherent receiver and digital coherent reception method Mar. 11, 2014
8649687 Methods and devices for modulating a signal Feb. 11, 2014
8649688 Radio frequency drive level control system and method for an electro-optic phase modulator Feb. 11, 2014
8649690 Optical communication reception system Feb. 11, 2014
8611763 Phase noise compensation in coherent optical communications systems Dec. 17, 2013
8611751 System, apparatus and method for communicating data via polarization multiplexing Dec. 17, 2013
8611760 Optical modulation device and optical modulation method Dec. 17, 2013
8600199 Optical modulator and optical modulating method Dec. 3, 2013
8594514 Phase-modulated transmission control using embedded control symbols Nov. 26, 2013
8594515 Digital phase conjugation for fiber-optic links Nov. 26, 2013
8582983 Method and system for generation of coherent subcarriers Nov. 12, 2013
8582981 Optical transmitter and control method therefor Nov. 12, 2013
8582980 Optical device and optical modulation method Nov. 12, 2013
8571418 High resolution optical waveform shaping device having phase shift compensation associated with optical intensity modulation Oct. 29, 2013
8565614 Spectrally efficient digital data transmission utilizing phase encoded MMW Oct. 22, 2013
8565617 Optical device, optical modulation method, and optical transmitter Oct. 22, 2013
8554023 Unbalanced Mach-Zehnder interferometer and modulator based thereupon Oct. 8, 2013
8526828 Optical transmitter and optical transmitter unit Sep. 3, 2013
8526829 System, method and apparatus for clockless PPM optical communications Sep. 3, 2013
8503887 Pre-equalized optical transmitter and pre-equalized optical transmission system Aug. 6, 2013
8494375 High speed communication Jul. 23, 2013
8488979 Multi-level polarization multi-level phase modulator Jul. 16, 2013
8483576 Driving method and driving apparatus for optical modulator, and optical transmitter using same Jul. 9, 2013
8472810 Optical signal transmitter and method for controlling polarization multiplexed optical signal Jun. 25, 2013
8472812 Optical communication system, optical communication method and optical communication apparatus Jun. 25, 2013
8463138 Multi-value optical transmitter Jun. 11, 2013
8457503 Optical transmitter apparatus Jun. 4, 2013
8437644 Vestigial phase shift keying modulation and systems and methods incorporating same May. 7, 2013
8433204 DQPSK demodulator Apr. 30, 2013
8411349 Optical modulator Apr. 2, 2013
8412054 DQPSK/DPSK optical receiver with tunable optical filters Apr. 2, 2013
8391724 Optical modulator, optical transmission device, and bias adjusting method Mar. 5, 2013
8384978 Optical clock Feb. 26, 2013
8378465 Method and apparatus for optical modulation Feb. 19, 2013
8380085 High-speed multi-level electronic signal generation for optical communications Feb. 19, 2013

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